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RE: You are not building a MLTL

There's definitely two discrete categories once the BR morphs into a MLTL, which is when the cab's acoustic path-length loading is great enough to either cause an increase in vent area [Av] and/or shortens the vent [Lp] for a given tuning [Fb].

I've never bothered to do any actual comparisons, but AFAIK there's no set minimum length before it happens judging by how the driver location moves based on both the path-length and cab averaged cross sectional area [CSA] the way I calculate it, though MJK in his Classic TL doc uses some percentage fixed locations based on taper.

They sim a bit differently, though not having done any real world comparisons, I’ve no clue if there's an audible difference.

GM

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